El Alisal: A new locality with trace fossils of the Puncoviscana Formation (late Precambrian-early Cambrian) in Salta Province, Argentina
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| Format: | Artículo científico |
| Langue: | en |
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Universitat de Barcelona
2003
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| _version_ | 1876439280088252416 |
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| author | G. F. Aceñolaza |
| author_facet | G. F. Aceñolaza |
| contents | El Alisal: A new locality with trace fossils of the Puncoviscana Formation (late Precambrian-early Cambrian) in Salta Province, Argentina G. F. Aceñolaza M. F. Tortello Ciencias de la Tierra Precambrian Trace fossils Northwestern Argentina Cambrian Puncoviscana Formation The Puncoviscana, Suncho and Las Aguaditas/Negro Peinado formations represent a thick siliciclastic foldedsuccession that crops out on a strip about 800 km long and 150 km wide in northwestern Argentina (Jujuy, Salta,Tucumán, Catamarca and La Rioja provinces). These sequences are lithologically characterized by very lowgrademetamorphic sediments grading from slates to schists; turbidites, pelagic clays, limestones and volcanicrocks. On the basis of paleoichnological data, these units have been assigned to the late Precambrian-early Cambrian.A new locality bearing well preserved trace fossils from the Puncoviscana Formation is described herein.The outcrop is located about 45 km west of Salta city (Salta Province), displaying an alternation of colored differentiatedgrayish-bluish slates and fine sandstones. Ichnofossils include Cochlichnus anguineus HITCHCOCK,Helminthoidichnites tenuis FITCH, Helminthoida isp., Monomorphichnus lineatus CRIMES, LEGG and MARCOSARBOLEYA, Planolites isp. and Torrowangea? isp., as well as some limb marks and a few slightly bended smoothtrails (indet.). An Early Cambrian age for the succession at El Alisal as well as some environmental considerationsare allowed by the ichnological association. In addition, the ichnogenus Planolites is mentioned for the firsttime from the red shales and conglomerate type facies at the neighbor locality of Chorrillos. 2003 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50510109 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.1 Vol.1 |
| format | Artículo científico |
| id | redalyc_50510109 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universitat de Barcelona |
| spellingShingle | El Alisal: A new locality with trace fossils of the Puncoviscana Formation (late Precambrian-early Cambrian) in Salta Province, Argentina G. F. Aceñolaza Ciencias de la Tierra Precambrian Trace fossils Northwestern Argentina Cambrian Puncoviscana Formation El Alisal: A new locality with trace fossils of the Puncoviscana Formation (late Precambrian-early Cambrian) in Salta Province, Argentina G. F. Aceñolaza M. F. Tortello Ciencias de la Tierra Precambrian Trace fossils Northwestern Argentina Cambrian Puncoviscana Formation The Puncoviscana, Suncho and Las Aguaditas/Negro Peinado formations represent a thick siliciclastic foldedsuccession that crops out on a strip about 800 km long and 150 km wide in northwestern Argentina (Jujuy, Salta,Tucumán, Catamarca and La Rioja provinces). These sequences are lithologically characterized by very lowgrademetamorphic sediments grading from slates to schists; turbidites, pelagic clays, limestones and volcanicrocks. On the basis of paleoichnological data, these units have been assigned to the late Precambrian-early Cambrian.A new locality bearing well preserved trace fossils from the Puncoviscana Formation is described herein.The outcrop is located about 45 km west of Salta city (Salta Province), displaying an alternation of colored differentiatedgrayish-bluish slates and fine sandstones. Ichnofossils include Cochlichnus anguineus HITCHCOCK,Helminthoidichnites tenuis FITCH, Helminthoida isp., Monomorphichnus lineatus CRIMES, LEGG and MARCOSARBOLEYA, Planolites isp. and Torrowangea? isp., as well as some limb marks and a few slightly bended smoothtrails (indet.). An Early Cambrian age for the succession at El Alisal as well as some environmental considerationsare allowed by the ichnological association. In addition, the ichnogenus Planolites is mentioned for the firsttime from the red shales and conglomerate type facies at the neighbor locality of Chorrillos. 2003 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50510109 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.1 Vol.1 |
| title | El Alisal: A new locality with trace fossils of the Puncoviscana Formation (late Precambrian-early Cambrian) in Salta Province, Argentina |
| topic | Ciencias de la Tierra Precambrian Trace fossils Northwestern Argentina Cambrian Puncoviscana Formation |
| url | https://www.redalyc.org/articulo.oa?id=50510109 |